Key interlock mechanism for calculating machines



April 21, 1964 B. H. TINGLEY 3,129,832

KEY INTERLOCK MECHANISM FOR CALCULATING MACHINES Original Filed May 12, 1954 21 Sheets-Sheet l (\i 9 LL ZOI April 21, 1964 B. H. TINGLEY I KEY INTERLOCK MECHANISM FOR CALCULATING MACHINES 21 Sheets-Sheet 2 Original Filed May 12, 1954 on: O m 2.. l

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April 21, 1964 B. H. TINGLEY KEY INTERLOCK MECHANISM FOR CALCULATING MACHINES 21 Sheets-Sheet 3 Original Filed May 12, 1954 April 21, 1964 B. H. TINGLEY KEY INTERLOCK MECHANISM FOR CALCULATING MACHINES 21 Sheets-Sheet 4 Original Filed May 12, 1954 April 21, 1 B. H. TINGLEY 3,129,882

KEY INTERLOCK MECHANISM FOR CALCULATING MACHINES Original Filed May 12, 1954 21 Sheets-Sheet 5 F Om 0.0 0 H N0 0o April 21, 1964 B. H. TlNGLEY 3,

KEY INTERLOCK MECHANISM FOR CALCULATING MACHINES Original Filed May 12. 1954 21 Sheets-Sheet 6 April 21, 1964 B. H. TINGLEY KEY INTERLOCK MECHANISM FOR CALCULATING MACHINES 21 Sheets-Sheet 7 Original Filed May 12, 1954 1 N5 v M n N April 21, 1964 B. H TINGLEY KEY INTERLOCK MECHANISM FOR CALCULATING MACHINES 21 Sheets-Sheet 8 Original Filed May 12, 1954 April 21, 19 64 B. H. TINGLEY KEY INTERLOCK MECHANISM FOR CALCULATING MACHINES 21 Sheets-Sheet 9 Original Filed May 12, 1954 April 21, 1964 B. H. TINGLEY 3,129,882

KEY INTERLOCK MECHANISM FOR CALCULATING MACHINES Original Filed May 12, 1954 21 Sheets-Sheet 10 n u 2 0 m g MON April 21, 1964 B. H. TINGLEY KEY INTERLOCK MECHANISM FOR CALCULATING MACHINES 21 Sheets-Sheet 11 Original Filed May 12, 1954 April 21, 1964 B. H. TINGLEY 3,129,832

KEY INTERLOCK MECHANISM FOR CALCULATING MACHINES Original Filed May 12, 1954 21 Sheets-Sheet 12 April 21, 1964 B. H. TINGLEY 3,129,882

KEY INTERLOCK MECHANISM FOR CALCULATING MACHINES Original Filed May 12, 1954 21 Sheets-Sheet 13 April 21, 1964 B. H. TINGLEY 3,129,882

KEY INTERLOCK MECHANISM FOR CALCULATING MACHINES Original Filed May 12, 1954 21 Sheets-Sheet 14 21 Sheets-Sheet 15 April 21, 1964 B. H. TINGLEY KEY INTERLOCK MECHANISM FOR CALCULATING MACHINES Original Filed May 12, 1954 April 21, 1964 B. H. TINGLEY T KEY INTERLOCK MECHANISM FOR CALCULATING MACHINES Original Filed May 12, 1954 21 Sheets-Sheet 16 April 21, 1964 B. H. TINGLEY KEY INTERLOCK MECHANISM FOR CALCULATING MACHINES 21 Sheets-Sheet 17 Original Filed May 12, 1954 A ril 21, 1964 B. H. TINGLEY 3,129,832

KEY INTERLOCK MECHANISM FOR CALCULATING MACHINES Original Filed May 12, 1954 21 Sheets-Sheet l8 FIG. I6A.

A ril 21, 1964 B. H. TINGLEY 3,129,882

KEY INTERLOCK MECHANISM FOR CALCULATING MACHINES Original Filed May 12, 1954 21 Sheets-Sheet 19 FIG. l7.

April 21, 1964 B. H. TlNGLEY KEY INTERLOCK MECHANISM FOR CALCULATING MACHINES Original Filed May 12, 1954 21 Sheets-Sheet 2O 

1. IN A MACHINE OF THE CLASS DESCRIBED HAVING A PIN CARRIAGE RECIPROCABLE ALONG A PREDETERMINED PATH OF TRAVEL AND A PLURALITY OF DEPRESSABLE MULTIPLIER KEYS, EACH ONE OF WHICH KEYS IS PROVIDED WITH A DEPENDENT STEM, A KEY LOCK SLIDE HAVING SPACED KEYS LIMITING EARS, ONE FOR EACH OF SAID KEYS, A SPRING FOR SAID SLIDE BIASING SAID SLIDE FOR MOVEMENT IN A CERTAIN DIRECTION PARALLEL TO SAID PREDETERMINED PATH OF CARRIAGE TRAVEL, A PAWL ON SAID SLIDE, A PROJECTION ON SAID PIN CARRIAGE ENGAGING SAID PAWL TO HOLD SAID SLIDE IN A FIRST POSITION AGAINST THE BIASING FORCE OF SAID SPRING UNDER CONDITIONS WHERE SAID CARRIAGE IS IN A FIRST POSITION, SAID EARS OF SAID SLIDE BEING CONFIGURATED AND SPACED ALONG SAID SLIDE SO AS TO BE DISPOSED BENEATH THEIR RESPECTIVE ASSOCIATED KEY STEMS PREVENTING DEPRESSION OF SUCH ASSOCIATED RESPECTIVE KEYS UNDER CONDITIONS WHERE SAID PIN CARRIAGE IS IN SAID FIRST POSITION, SAID CONFIGURATION AND SPACING OF SAID EARS BEING PREDETERMINED TO POSITION THE SPACE BETWEEN ADJACENT EARS BELOW SAID KEY STEMS UNDER CONDITIONS WHERE SAID PIN CARRIAGE IS MOVED A PREDETERMINED DISTANCE IN SAID CERTAIN DIRECTION CAUSING SAID BIASING SPRING ALSO TO URGE SAID SLIDE SAID CERTAIN DISTANCE. 